Fuel cell marker



FIG. 1 is a left side view of the fuel cell marker;

FIG. 2 is an enlarged back view of the design of FIG. 1;

FIG. 3 is a right side view of the design of FIG. 1;

FIG. 4 is an enlarged front view of the design of FIG. 1;

FIG. 5 is a top view of the design of FIG. 1; and,

FIG. 6 is a bottom view of the design of FIG. 1.

The ornamental design for a fuel cell marker, as shown and described.